Go to Dashboard and you'll see Users. Click Users > Add New.
Fill out the details: Username, email address, first and last name, website then generate a password by clicking 'show password'
Then choose the role that is necessary.
Here are the default roles in WordPress:
- Administrator
- Editor
- Author
- Contributor
- Subscriber
- Super Admin
If you have Woocommerce, there are additional roles:
- Shop Manager
- Customer
When you're done, click 'Add New User'